3.5V Replacement Lamp for Welch Allyn 03700-U Compatible Replacement Halogen Lamp for Welch Allyn 03700-U Used in medical retinoscopes 3.5 Volt Single Ended Screw Base T-2 3/4 Bulb Shape 40 Hours Rated Average Life 2900K Color Temperature Clear Lamp .70 in (17.78 mm) Max Overall Length .35 in (8.8 mm) Bulb Diameter RoHS Compliant Other part numbers, 03700, BO03700, WA-03700-U, WA03700U, CL2166 Compatible with: Welch Allyn 18100 Retinoscope Please Note: -Buyer pays PayPal. -Free domestic shipping is by USPS First Class Mail. -All orders placed by 3:00PM EST, ship same day Monday-Friday. -USPS tracking email will follow the evening of shipment. -International buyers, USPS First Class International can take up to 45 days to arrive. Faster options are available during checkout. -Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. -Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.