A golf club head comprises a club head body, a channel, and a recessed port. The method comprises combining a hydrated magnesium hexaborate with oxides of Y, Gd, Ce and Pr to form a mixture and firing the mixture in a slightly reducing atmosphere to form the phosphor. Noncontact information storage means has been in-mold molded onto a part of the holding component so that the noncontact information storage means is bonded integrally to a substrate constituting the holding component. According to the specifications of the operating systems, a delay time compensation program is added to the M system process programs to ensure the synchronization of the systems therebetween. In a version adapted for the treatment of varicose veins, the support is a needle serving as a sheath to a fibre optic.