ERSA SR 100 Practical and flexible solder wire dispenser The ERSA SR 100 solder wire dispenser is the ideal addition to any soldering workbench, with a heavy base plate that makes it extremely stable. The SR 100 was designed to handle different reel sizes (250/500/1,000 g). A centering nut ensures that different-sized solder wire reels are centered correctly. The variable solder wire guide accommodates different solder wire diameters and allows the solder wire feed to be adjusted quickly to the correct position without the need to move the ERSA SR 100. The optional ERSA SR 101 add-on is easily mounted so that you can use a second solder wire reel. ERSA solder wire - the right alloy for each application.