NOTICE: In order to use 12mm springs you will also the AV1012 Spring Cups which will be released in June. We felt that racers that already joined the 12mm spring group may want to upgrade to these while waiting for the cups to arrive. When the Spring Cups arrive you may purchase them with these in a set to make the transition more simplified. AVID B4.1 12mm Spring Collar Adapters are machined from billet 6061-T6 aluminum allow, black anodized, and 4-40 x 1/16" stainless steel set screws to give that premium look. These collars are used by sliding them over your stock AE collars and securing them in place with the included SS set screws. With these adapters you will be able to run the 12mm Avid Springs Sets (must also have AV1012 Spring Cups which will be available in June). Fits on any B4, B4.1, T4, T4.1, B44.1 and SC10. Specifications - Material: Billet 6061-T6 - Weight: 4.4g (Set) - Fits on any B4, B4.1, T4, T4.1, B44.1 and SC10. - Each package includes 4 shock collars, 4 stainless steel set screws (4-40 x 1/16"), and 1 AVID mini decal sheet. - UPC: 818021010249 Read more and see photos of these quality Spring Collar Adapters via the source link. Source: http://www.avidrc.com/product/5/accesories/437/B41-12mm-Spring-Collar-Adapters-AV1014-accesories.html
