Check the listing for details. 2pcs Milling Machine B178 Part Clock Return Spring 25mm Fit Bridgeport Mill Tool. Condition: New. Listed at 29.91 USD. Will fit Acer, Bridgeport, and most other Taiwanese import mills. Your clock spring housing must have a slit for spring to fit. This clock spring will not fit if there is a pin in the housing. The clock spring must stay closed (steel strapped) during installation. This spring is best if it is pressed into the housing. Diameter : 44mm Suit For 3# 4# Milling Machine Package ：2pc Miling machine Spring Please Note the size when you submit a order. We provide 90 days return service ,any question please contact me Payment - We only accept Payments via Paypal. - If you are paying through Paypal using an eCheck, please be aware that we will only ship your order after the payment has been cleared. We Ship to worldwide Item Will Be Shipped Within 1-2 working days as soon as your Payment Verified. International Buyers – Please Note: a)Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. b)Please check with your country's customs office to determine what these additional costs will be prior to bidding/buying. Shipping Method :CHina & HongKong & Singapore Post Air Mail service Notice:International shipping is Unstable,parcel may be hold by customs or other factors occasionally, Please Contact us if not receive item. The Approximate Delivery time is As below: