Vision Products Short Adapter Block Black. Available in Short Medium Long and Extra long to suit your exact length of pull desire The Vision Standard and Pro Buttstocks include 24 mm (0.95 in) of length-of-pull adjustment. These adapter blocks can be used to shift the adjustment range to help you achieve your preferred setting. Note: The Tikka T3x Pro Chassis may be compatible with the Medium or Long adapter blocks depending on your particular action we've experienced some variation here which is why an extra long block is supplied. Specifications for Vision Products Adapter Block: Manufacturer: Vision Products Color: Black Gun Type: Rifle Fabric/Material: 7075-T6 Aircraft Aluminum Finish: Anodized Features of Vision Products Adapter Block Customizes your LOP range Package Contents: Vision Products Adapter Block Adapter block 4x Black Stainless Steel Screws Vision Products VISION-404-S: Short Adapter Block Black