WW size 8mm watch lathe ER11 collet adapter GAVAN. WW size 8mm watch lathe ER11 collet adapter GAVAN By using this adapter with ER11 collet, it can be used for WW (0.275 x 40) 8mm watch lathe. About other area, please ask me. International Buyers - Please Note. We do not mark merchandise values below value or mark items as "gifts" - US and International government regulations prohibit such behavior.