Rare right-handed 4000 series Space Shuttle glove restraint layer, with an ILC-Dover parts tag sewn on the back of the wrist: "Item: Restraint Assembly, Glove 4000, Part No. 0106-88936-10, Serial No. 283, Size ZSA, Code ID 74897, MFG 1/00." In very fine condition. Development of the Series 4000 started in 1985 as a follow-up to the 3000 series glove to reduce bladder bunching and to improve fit and mobility. They were first flown in 1986 and continued through 1991 when it was replaced by the Phase VI glove. The 4000 Series was based on nine standard hand sizes and provides a 'closest fit' glove sizing capability. Further development of the 4000 series gloves resulted in customization for astronauts that did not fit into one of the nine standard sizes. Ten strings (two per finger) are used to adjust the sizing of each finger. A small blue metal ring (one per string) is used to lock each of the strings into place. There are 16 holes at the wrist where the Restraint Glove is attached to the bearing ring.
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