There are 2 categories of replacement bands.
The classic grand series require replacements band style GB BANDS (assorted colors) or GB BANDS-1 (all black). The stainless/sterling Grand Band is a perfect rectangle and requires bands that have a width of 3/8" Style numbers include:
GB 1000, GB 1025, GB 1050, GB 1200, GB 1225, GB 1250, GB 1300, GB 1325, GB 1350 and GB 3000
The 2nd Generation Grand Bands require band style GB 6000BANDS (assorted colors) or GB 6000BANDS-1 (all black). The stainless/sterling Grand Band has slighted round edges and requires bands that have a width of 7/16" Style numbers include:
GB 6000, GB 6000PS, GB 6000PG, GB 6000FS, GB 6000FG, GB 6000SS, GB 6000SG, GB 6000 8SDS, GB 6000 8SDG, GB 8000DG, GB 7000, GB 7000S, GB 7000F
Top grain leather (or full grain leather) is the top-most, outer-most part of the hide. The most durable, natural and breathable, the top grain is most sought out for high end accessories, clothing and furniture. Depending on thickness and the tanning process the top grain ages beautifully and over time will wear well. Top grain leather is the most expensive of the hides.
Split Leather – after the top grain has been removed from the hide the remaining lower piece is the split. Maintaining many of the characteristic of the top grain, strength and durability in particular, what make split grains so valuable are the processes such as tanning and other process that create the soft suede finish. While less expensive than the top grain, the split leather is perfect most small personal leather accessories.
Bonded leather is least expensive of all three of the leather types. Using the leather materials that remain from the top grain and split grain processes, bonded leather, as the name implies, creates leather sheets that are genuine leather but are not full hides. Offering a less expensive option, bonded leather is great for small accessories and jewelry boxes while still creating the feel and quality associated with leather products.